Current versions of DaVinci Resolve (14/15) appear to be incompatible with Windows 7 now, they use an API which requires at least Windows 8.1 or even 10 (with the result that "the procedure entry point DeleteCriticalSection could not be located in the dynamic link library api-ms-win-core-synch-l1-2-0.dll" under Windows 7, while this entry point exists in api-ms-win-core-synch-l1-1-0.dll).
An older version of Resolve may still work under Windows 7. But is there any known archive for them? The BlackMagic website offers only the latest free edition.
_
P.S.:
Let's try the
VideoHelp Software archive... (just got reminded: a forum login is required to download from here)